Despite losing 30 kilograms in the last four years, she now aims to lose even more weight in order to make it into the 57-60 kilogram lightweight division.

"I'm trying to get into the 60 kilogram class because that's one of the Olympic divisions and there are no other girls in the higher divisions really. So if I want to get better I have to go lighter," she says.

While Cassy is known for her power punches, her aim is to now sharpen her footwork in order to make herself an even more formidable fighter.

"I just always have been [a hard hitter]," she says.

"It's just been a matter of getting the rest of me up with my hitting power."